2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29128A transition-metal oxide NaCo_2O_4 is a layered oxide in which CoO_2 and Na alternately stack along the c axis. Recently we have found that this compound shows unusually large thermopower with low resistivity, which is comparable to those of Bi_2Te_3. The negative transverse magnetoresistance and the strongly temperature-dependent Hall coefficient suggest that electron correlation dominates the conduction mechanism in NaCo_2O_4.3 pages (LaTeX), 4 EPS figuresMaterials ScienceStrongly Correlated Electronstext